【摘要】 利用PMS资料对延安2003年9月17日降水性层状云各高度上的粒子特征量和粒子谱进行了分析研究,结果表明,降水性层状云宏微观垂直结构配置或云粒子主要特性可以分为5个层次。过冷水滴和冰晶共存层存在,冰晶快速增长,此层的存在可能是发生降水的关键;在0℃层以下,存在比较深厚的云滴浓度小、含水量较小的小云滴层,应是导致地面雨强较小的重要因素之一。更多还原

【Abstract】 Using the PMS data in different heights,the vertical macro-and micro-structures or the coagulation water phase of stratiform cloud on 17 September 2003 can be partitioned into 5 growth layers.There is an active growth layer and super cooled water exists with ice crystals and it may be an important feature layer to occur rain in stratiform cloud.There is a vaporizing layer below 0℃ layer and it is far thick,which should be one of the important reasons of small precipitation on ground更多还原